Sex Differences in 2D:4D and Aggression in Children and Adolescents From Five Regions of Russia
ABSTRACT The aim of this study was to consider digit ratio (2D:4D: a putative marker of prenatal testosterone and estrogen levels) and aggression in a sample of 1,452 children and adolescents (mean age 13.6 years) from five regions of Russia. The 2D:4D was calculated from direct measurements of the fingers, and aggression scores were obtained from completed Buss and Perry (J Pers Soc Psychol 63 (1992) 452–459) aggression questionnaires. The 2D:4D demonstrated significant sexual dimorphism, with lower 2D:4D in boys in all regions. Physical aggression scores were highest in boys, but verbal aggression, anger and hostility were highest in girls. The highest right hand 2D:4D in boys was found in the most northerly population (Central Russia Region). Our data revealed small, but highly significant negative correlations between right 2D:4D, right–left 2D:4D (DR-L) and self-ratings on physical aggression in boys, but not in girls. These relationships remained after considering Russian ethnics only, and controlling for region. We suggest that the associations may be due to sex differences in prenatal androgen secretion. Am J Phys Anthropol 152:130-139, 2013. VC 2013 Wiley Periodicals, Inc.
This paper examines the role of the place of living (urban or rural society) and its social- cultural context in determining the parent- adolescent child value similarity. We interviewed representatives of two generations: parents and children from 90 families in Moscow and 62 families in Russian villages (n=304 people). Our findings indicated the influence of socio- cultural context (urban-rural) on the transmission of values. Conservation values were primarily transmitted from parents to children in the more traditional, rural context. Openness to change, Self-Enhancement and Self-Transcendence values were transmitted from parents to children mainly in the urban context. Perceived psychological closeness between parents and adolescents (as perceived by adolescents) affected the adoption of values by the adolescents in both urban and rural contexts. All values of adolescents were more similar to the values of peers than to their parents, in both urban and rural contexts.
Background The issue of antisocial behaviour and adolescent aggressiveness are usually studied from the perspective of family psychological well-being. Social and economic inequality of contemporary families are important factors of cultural and historical context of the of modern adolescents’ developmental situation. Objective The paper provides an attempt of articulating the theoretical basis of adolescents’ aggression, i.e. family SES analysis. The paper is also dedicated to the research of differences in adolescents’ aggression indicators within gender- and family SES- groups spectrum. Design The research was conducted as an online survey in the public schools of Russian Federation. The present sample consisted of 883 respondents (59% were females, 41% were males). The average age was 16 years. Adolescents’ aggression was assessed by the short version of Buss-Durkey Inventory. Statistical analysis methods included Kruskall-Wallis test, T-test, Mann-Whitney test and factor analysis (maximum likelihood). Results. The study revealed that differences in aggression indicators are mainly reflected in the subjective aspects of aggression (resentment and guilt), and also a general indicator of aggression depending on the socio-economic status of the family. Different levels of preparedness for physical aggression are shown by respondents from families in which only the father or only the mother works. Both females and males are prone to various manifestations of aggressiveness. Differences in indicators of aggression in the context of cultural capital and the socio-economic status of the family are reflected mainly in the subjective aspects of aggression. Conclusion. Statistically speaking, the differences obtained are quite significant, but from an absolute point of view they are extremely small. The indicators of socioeconomic well-being of a family are related to adolescent aggression indirectly, with psychological characteristics being the key point. Specific features of the relationship between parents and the child, features of educational practices preferred by parents, features of family organization, etc. Economic well-being appear only a condition that facilitates or, conversely, complicates the implementation of educational practices adopted in the family. The major role belongs to the activity of both parents and children. A further research is required to verify the latter.
Abstract The role of genes in the expression of aggression and masculinity traits in humans has been a focus of recent behavioral genetic studies. This is the first study on the variation in aggression, the digit ratio (the ratio between the second and the fourth digits, 2D:4D), the directional asymmetry in 2D:4D (DR-L) and polymorphisms of the AR, DRD4, and 5-HTTL genes in simple hunter-gatherers, namely the Hadza of Tanzania (142 adult men). The distribution of AR, DRD4E3, and 5-HTTLPR genotypes and allele frequencies in Hadza was compared to other African populations on which the data were available. Hadza and Ariaal differed significantly in the distributions of frequencies of AR alleles with different numbers of CAG repeats. Hadza population was similar to other African populations in the distribution of allelic frequencies of the DRD4E3 locus, and to Afro- Americans in the distribution of allelic types of the 5- HTTLPR locus. We found no influence of AR gene on the right hand 2D:4D ratio,DR-L, and any of aggression subscales of the Buss-Perry Aggression Questionnaire (AQ). Although, a weak positive correlation between CAG repeats and the left hand 2D:4Dwas found. The multiple regression analysis with digit ratios, DR-L and aggression subscales of AQ as dependent variables and the three gene candidates (AR, DRD4E3, and 5-HTTLPR) as independent variables revealed the following: men with lower number of CAG repeats had significantly lower left hand2D:4D ratio;men with highernumbers of 48-bp unit copies in exon 3 of a VNTR polymorphism in the DRD4 gene had significantly lower digit ratios on both hands; no effect of the 5-HTTLPR gene on either the digit ratio or aggressive behavior. These findings demonstrate the complexity of gene effects on digit ratios and aggression and call for simultaneous analysis of more candidate genes. It is noteworthy that these results were obtained for a human population that is still practicing foraging and has been subjected to a high selective pressure due to harsh environments and practically has no access to modern medical care. Hadza are highly egalitarian, and their culture does not favor persons with a dominant or aggressive behavior. It is still to be found to what extent the relationships observed in this study are similar to those in other human populations.
Students' internet usage attracts the attention of many researchers in different countries. Differences in internet penetration in diverse countries lead us to ask about the interaction of medium and culture in this process. In this paper we present an analysis based on a sample of 825 students from 18 Russian universities and discuss findings on particularities of students' ICT usage. On the background of the findings of the study, based on data collected in 2008-2009 year during a project "A сross-cultural study of the new learning culture formation in Germany and Russia", we discuss the problem of plagiarism in Russia, the availability of ICT features in Russian universities and an evaluation of the attractiveness of different categories of ICT usage and gender specifics in the use of ICT.
The results of cross-cultural research of implicit theories of innovativeness among students and teachers, representatives of three ethnocultural groups: Russians, the people of the North Caucasus (Chechens and Ingushs) and Tuvinians (N=804) are presented. Intergroup differences in implicit theories of innovativeness are revealed: the ‘individual’ theories of innovativeness prevail among Russians and among the students, the ‘social’ theories of innovativeness are more expressed among respondents from the North Caucasus, Tuva and among the teachers. Using the structural equations modeling the universal model of values impact on implicit theories of innovativeness and attitudes towards innovations is constructed. Values of the Openness to changes and individual theories of innovativeness promote the positive relation to innovations. Results of research have shown that implicit theories of innovativeness differ in different cultures, and values make different impact on the attitudes towards innovations and innovative experience in different cultures.